[Tutor] Database topic now fixed

[Alan Gauld]

The mistakes in my databae topic have now been rectified.
I have no idea how I managed to post the file without testing 
that section of code. And unfortunately it's one of the areas 
where SqlLite SQL syntax varies from the Oracle syntax that 
I'm most familiar with. But that's only a partial excuse since 
my code wasn't actually valid Oracle code either, it was just 
wrong!

Hopefully all errors are now removed

apologies once again,

Alan Gauld
Author of the Learn to Program web site
http://www.freenetpages.co.uk/hp/alan.gauld